Just because the version number ticked up by 10 from the previous 155.11180.0 doesn't mean it’s boring. Security researchers at Microsoft’s Defender team analyze 24 terabytes of data daily. This specific delta update focuses on three major areas:
While is a valid historical update, manually downloading it is unnecessary for most modern systems. The better practice is to use PowerShell ( Update-MpSignature ) or Windows Update to obtain the latest security intelligence. If offline installation is mandatory, retrieve the file from the Microsoft Update Catalog only. Just because the version number ticked up by
The installer runs silently in the background; there is no progress bar, but your protection definitions will be updated once it finishes. Computerworld Alternative Update Methods there is no progress bar